Identification of Thermal Hot Spots in Urban Areas through Establishing Heat Index in Support of Mitigation Plans to Counteract Urban Heat Island (UHI): A Case Study in Colombo Urban Area – Sri Lanka

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dc.contributor.authorPerera, T.A.N.T
dc.contributor.authorNayanajith, T.M.D.
dc.contributor.authorPremasiri, H.D.S.
dc.contributor.authorJayasinghe, G.Y.
dc.date.accessioned2021-02-03T06:58:15Z
dc.date.available2021-02-03T06:58:15Z
dc.date.issued2020
dc.description.abstractThe creation of thermally comfortable microclimates in urban environments is very essential for human well-being. This study was conducted to assess the outdoor thermal comfort by establishing Heat Index (HI) values and identifying thermal hot spots in Colombo urban city of Sri Lanka. Fourteen sites (14) with different urban designs were selected purposively which were highly populated during daytime. Daytime temperature and humidity values of selected locations were collected to calculate HI values. Further, questioner surveys were conducted among 168 individuals purposively to evaluate the thermal perception of people who exposed to outdoor thermal conditions. Five study sites (Borella, Colombo Fort, Maradana, Wellawaththa, Liberty junction) out of 14 selected study sites were identified as thermal hotspots in Colombo. The average day time HI value for Colombo city was 37.36°C during the study period. The observed HI values were varied between 40.35°C-33.82°C. The highest average day time HI value was observed at Maradana (40.35°C) and lowest HI at Thummulla (33.82°C). The questionnaire survey was revealed most of the study sites consisted of uncomfortable outdoor thermal conditions and people prefer windier, shady, and low temperature outdoor micro climatic conditions in Colombo. The study was revealed that the most important feature of public spaces is the availability of shade due to the intense solar radiation. It is important to promote an urban design that creates shade and ventilation. Keywords: Heat index; Outdoor thermal comfort; Thermal hotspot; Urban micro-climateen_US
dc.identifier.isbn9789550481293
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/5761/proceeding_oct_08-244.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;International Research Conference
dc.subjectEnvironmental Scienceen_US
dc.subjectEcologyen_US
dc.subjectClimate changeen_US
dc.titleIdentification of Thermal Hot Spots in Urban Areas through Establishing Heat Index in Support of Mitigation Plans to Counteract Urban Heat Island (UHI): A Case Study in Colombo Urban Area – Sri Lankaen_US
dc.title.alternativeInternational Research Conference 2020en_US
dc.typeOtheren_US
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